Signal sending and receiving method, network device and terminal

Abstract

This disclosure provides a signal sending method, a signal receiving method, a network device and a terminal. The signal sending method includes: determining a position and beam direction of a synchronization signal block SSB to be sent; sending the SSB according to the determined position and beam direction of the SSB.

What is claimed is: 
     
       1. A signal sending method, comprising:
 determining a position and beam direction of a synchronization signal block (SSB) to be sent; 
 sending the SSB according to the determined position and beam direction of the SSB; 
 wherein, one SSB burst set comprises a preset quantity of repeatedly sent SSBs, and the determining the position of the SSB to be sent comprises: 
 determining a candidate position of a first SSB of the preset quantity of repeatedly sent SSBs in a half frame, such that the candidate position offsets from a start point of the half frame by a fixed N quantity of orthogonal frequency division multiplexing (OFDM) symbols, wherein two adjacent SSBs of the preset quantity of repeatedly sent SSBs are spaced by 3 OFDM symbols, N is a positive integer, and there is a correspondence between a value of N and a number of times the SSB is repeatedly sent, the number of times the SSB is repeatedly sent is obtained by the value of N; 
 wherein the sending the SSB according to the determined position and beam direction of the SSB comprises: 
 sending a same SSB signal in different beam directions, wherein different beams correspond to different respective frequency resources. 
 
     
     
       2. The signal sending method according to  claim 1 , further comprising:
 sending remaining minimum system information (RMSI), wherein the RMSI carries indication information of the number of times the SSB is repeatedly sent; or 
 indicating the number of times the SSB is repeatedly sent by using a primary synchronization sequence and/or a secondary synchronization sequence in the SSB. 
 
     
     
       3. The signal sending method according to  claim 1 , wherein broadcast information of the SSB indicates whether there is a beam common reference signal other than a default beam common reference signal in one slot. 
     
     
       4. A signal receiving method, comprising:
 receiving a synchronization signal block (SSB) sent by a network device in a position and beam direction of the SSB determined by the network device; 
 obtaining, according to the SSB, information of time-frequency synchronization and cell identification; 
 wherein, one SSB burst set comprises a preset quantity of repeatedly sent SSBs, and in a half frame, a candidate position of a first SSB in the preset quantity of repeatedly sent SSBs offsets from a start point of the half frame by a fixed N quantity of orthogonal frequency division multiplexing (OFDM) symbols, two adjacent SSBs of the preset quantity of repeatedly sent SSBs are spaced by 3 OFDM symbols, N is a positive integer, and there is a correspondence between a value of N and a number of times the SSB is repeatedly sent, the number of times the SSB is repeatedly sent is obtained by the value of N; 
 wherein the receiving the SSB sent by the network device in the position and beam direction of the SSB determined by the network device comprises: 
 receiving a same SSB signal in different beam directions, wherein different beams correspond to different respective frequency resources. 
 
     
     
       5. The signal receiving method according to  claim 4 , further comprising:
 receiving remaining minimum system information (RMSI), wherein the RMSI carries indication information of the number of times the SSB is repeatedly sent; or 
 obtaining, through a primary synchronization sequence and/or a secondary synchronization sequence in the SSB, the number of times the SSB is repeatedly sent; or 
 obtaining, through blind detection, the number of times the SSB is repeatedly sent. 
 
     
     
       6. The signal receiving method according to  claim 4 , further comprising:
 obtaining, through broadcast information of the SSB, a beam common reference signal other than a default beam common reference signal in one slot. 
 
     
     
       7. A network device, comprising: a processor, a transceiver, and a memory storing therein a program executable by the processor, wherein when the processor executes the program, following step is implemented: determining a position and beam direction of a synchronization signal block (SSB) to be sent;
 the transceiver is configured to send the SSB according to the determined position and beam direction of the SSB; 
 wherein, one SSB burst set comprises a preset quantity of repeatedly sent SSBs, and when the processor executes the program, following step is further implemented: 
 determining a candidate position of a first SSB of the preset quantity of repeatedly sent SSBs in a half frame, such that the candidate position offsets from a start point of the half frame by a fixed N quantity of OFDM symbols, wherein two adjacent SSBs of the preset quantity of repeatedly sent SSBs are spaced by 3 OFDM symbols, N is a positive integer, and there is a correspondence between a value of N and a number of times the SSB is repeatedly sent, the number of times the SSB is repeatedly sent is obtained by the value of N; 
 wherein the transceiver further is configured to send a same SSB signal in different beam directions, wherein different beams correspond to different respective frequency resources. 
 
     
     
       8. A terminal, comprising: a processor, a transceiver, and a memory storing therein a program executable by the processor, wherein,
 when the processor executes the program, the method according to  claim 4  is implemented.